Now I am making a mail server for the Internet at home.

You might think why Ebata is doing it nowadays.

First of all, "making a server at home" is equal to "the Ebata's home network comes to a target of cyber attack".

The best thing to do is "do-nothing", however, I have an inevitable private reason.

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When I was young, I tried to make a mail server. However I gave it up because of the pain,

Mail server is not like a Web server or FTP server, just launch it.

The mail server differs from other servers in that "mail conversation" must be done between mail servers.

And it is premise that mail server should "believes" another mail server, and should be "believed" by another mail server.

If my mail server connects with a mail server which do cyber attacks, serious situation will appear.

In fact, in the past, there was a case that Internet servers all over the world became malfunctioning due to the attack using a mail server (Although most people all over the world did not know the word "Internet").

(To be continued)